Hydrazinium perchlorate hemihydrate

Anhydrous hydrazinium perchlorate N2H5CIO4 has been prepared by the neutralization of N2H4 H2O (99.5%) with 60% perchloric acid at 0°C [4]. Hydrazinium perchlorate monohydrate (N2H5CIO4 H2O) and hydrazinium perchlorate hemihydrate (N2H5CIO4 O.5H2O) are prepared by the reaction of ammonium perchlorate with hydrazine hydrate [6] ... 

Hydrazine Perchlorates - Hydrazinium Perchlorate (N2H5CIO4), Hydrazinium Perchlorate Monohydrate (N2H5CIO4 H2O), Hydrazinium Perchlorate Hemihydrate (N2H5CIO4 O.5H2O), and Hydrazonium Perchlorate [N2Hg(C104)2]... 

Liminga, R. (1967) Hydrogen bond studies the crystal structure of hydrazinium perchlorate hemihydrate, N2H5C104-(1/2)H20. Acta Chemica Scandinavica, 21, 1217-1228. 

Figure 6.5 shows typical DTA curves of hydrazinium perchlorate hemihydrate versus Mg -doped hydrazinium perchlorate hemihydrate. It can be seen that the compound prepared by using Mg " -doped hydrazinium perchlorate hemihydrate decomposes at a lower temperature of 222 °C compared to N2H5CIO4 O.5H2O, which decomposes at 263 °C. This shows that Mg " -doped hydrazinium perchlorate hemihydrate displays different thermal properties than hydrazinium perchlorate. When the doped compound is heated, the crystal lattice is broken and Mg " " ions are displaced from its sites. This results in an increase in the concentration of defects in the lattice. The decrease in the decomposition temperature of Mg " " doped hydrazinium perchlorate compared to hydrazinium perchlorate may therefore be attributed to the production of larger... 

Hydrazine perchlorates are of interest due to their possible use as solid propellant oxidizers. Hydrazine forms two different perchlorates, depending on the degree of protonization. Hydrazinium (l-E) perchlorate (N2H5CIO4) forms N2H5CIO4 monohydrate and hemihydrate. The divalent (2-I-) perchlorate forms hydrazonium perchlorate, N2H6(C104)2. Because both salts are high explosives, their preparation has to proceed with extreme precaution. Hydrazinium perchlorates can be sublimed under vacuum without decomposition. 

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